Section 7978.
7978. In any extrahazardous tunnel or underground mine smoking by employees or open flame shall be prohibited. Welding or cutting with arc or flame underground in other than fresh air shall be done under the direct supervision of qualified persons who shall test for gas and vapors before welding or cutting starts and continuously during […]
Section 7964.
7964. Whenever an access shaft is used as the normal means of entrance or exit to an underground mine or tunnel, it shall be constructed of fireproof material or fireproofed by chemical or other means. (Added by Stats. 1972, Ch. 1430.)
Section 7964.5.
7964.5. Nothing contained in this part shall restrict the division in contracting with the Secretary of the Interior for an approved state plan for mines under P.L. 89-577 (30 U.S.C. 721 et seq.). (Added by Stats. 1972, Ch. 1430.)
Section 7965.
7965. Any tunnel or underground mine classified by the division as gassy shall operate under special procedures adopted by the board, as well as rules, regulations, special orders, or general orders for nongassy underground mines and tunnels. (Added by Stats. 1972, Ch. 1430.)
Section 7951.
7951. As used in this part: (a) Tunnel shall include excavation, construction, alteration, repairing, renovating, or demolishing of any tunnel except tunnel work covered under the compressed air safety orders adopted by the Occupational Safety and Health Standards Board and manhole construction. (b) “Tunnel” means an underground passageway, excavated by men and equipment working below the earth’s […]
Section 7966.
7966. In any tunnel classified as gassy by the division, there shall be tests for gas or vapors taken prior to each shift and at least hourly during actual operation. If a mechanical excavator is used, gas tests shall be made prior to removal of muck or material and before any cutting or drilling in […]
Section 7952.
7952. There shall be within the division a separate unit of safety engineers trained to inspect all tunnel construction and mine operations. (Added by Stats. 1972, Ch. 1430.)
Section 7967.
7967. Whenever gas levels in excess of 10 percent of the lower explosive limit are encountered initially in a tunnel or underground mine classified as gassy, the division shall be notified immediately by telephone or telegraph. The chief of the division or his authorized representative may waive subsequent notification for gas readings less than 20 […]
Section 7953.
7953. Sufficient manpower shall be maintained to provide for four annual inspections of underground mines, one inspection of surface mines or quarries annually, and six inspections of tunnels under construction annually. (Added by Stats. 1972, Ch. 1430.)
Section 7968.
7968. In any gassy tunnel or underground mine, the division may order work halted until adequate testing can be completed to determine the level of hazard from gases or vapors. A notice of such shutdown shall be filed by the division inspector with his superiors as soon as practicable. Any overruling of such order must […]